Is birth weight associated with pregestational maternal BMI? BRISA Cohort, Ribeirão Preto, Brazil

Is birth weight associated with pregestational maternal BMI? BRISA Cohort, Ribeirão Preto, Brazil

Given the increase of women with excess weight or obesity and its possible effects on birth weight, the present study aimed to investigate the association between pregestational maternal body mass index (BMI) and birth weight in a birth cohort from Ribeirão Preto, SP, Brazil. This was a prospective...

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Bibliographic Details
Published in:Brazilian journal of medical and biological research Vol. 54; no. 1; p. e10037
Main Authors: Trombe, K S D, Rodrigues, L S, Nascente, L M P, Simões, V M F, Batista, R F L, Cavalli, R C, Grandi, C, Cardoso, V C
Format: Journal Article
Language:English
Published: Brazil Associacao Brasileira de Divulgacao Cientifica (ABDC) 01-01-2021
Revista Brasileira de Pesquisas Medicas
Associação Brasileira de Divulgação Científica
Subjects:
Adult
Analysis
BIOLOGY
Birth Weight
Body Mass Index
Body weight
Brazil - epidemiology
Cohort study
Female
Humans
Infant, Newborn
Infants (Newborn)
Low birth weight
Male
Malnutrition
Medical records
MEDICINE, RESEARCH & EXPERIMENTAL
Neonates
Obesity
Obesity - epidemiology
Overweight
Overweight - epidemiology
Pregnancy
Pregnancy Trimester, Second
Pregnant women
Prospective Studies
Womens health
Young Adult
Brazil
Body mass index
Obesity
Birth weight
Cohort study
Overweight
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Summary:Given the increase of women with excess weight or obesity and its possible effects on birth weight, the present study aimed to investigate the association between pregestational maternal body mass index (BMI) and birth weight in a birth cohort from Ribeirão Preto, SP, Brazil. This was a prospective study conducted on 1362 mother-child pairs involving singleton births. The women were evaluated using standardized questionnaires during the second trimester of pregnancy and at the time of childbirth. Information about the newborns was obtained from their medical records. The dependent variable was birth weight, categorized as low, adequate, or high. The independent variable was pregestational maternal BMI, categorized as malnutrition, adequate weight, overweight, and obesity. A multinomial regression model was used to estimate the crude and adjusted relative risk (RR) of low and high birth weight. A high frequency of pregestational excess weight (39.6%) was detected and found to be independently associated with high birth weight (RR=2.13, 95%CI: 1.19-3.80 for overweight and RR=3.34, 95%CI: 1.80-6.19 for obese pregnant women). There was no association between pregestational malnutrition and low birth weight (RR=1.70; 95%CI: 0.81-3.55). The present data showed a high rate of women with excess pregestational weight, supporting the hypothesis that pregestational BMI may contribute to high birth weight babies and indicating the need for actions aiming to prevent excessive weight in women at reproductive age.
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ISSN:0100-879X
1414-431X
1414-431X
1678-4510
DOI:10.1590/1414-431X202010037